nfs speedup in current compared to 5.2 RC2

[Jon Noack]

Claus Guttesen wrote:
> Was testing 5.2 RC2 as NFS-server. Mounted three
> NFS-clients (two 5.2 based on i386-port and one
> current as of Feb. 13'th based on amd64). I mounted
> with tcp ver. 3 and r/w data size set to 16384.
> 
> <snip>
> 
> I cvsup'ed to current as of Feb. 18'th approx. 13.00
> GMT and upgraded the server. Did the same test as
> mentioned above, this time the NFS-server kept
> answering during the copying.
> 
> <snip>
> 
> Although this only applies to my particular
> environment I have the impression that NFS behaves
> better in current compared to RC2.

The NFSv3/TCP rsize and wsize were raised from 8K to 32k in -CURRENT. 
You might try those values for even more speed.

The commit and PR:
http://lists.freebsd.org/pipermail/cvs-src/2004-January/017730.html
http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/62024

Also, the thread in -performance that resulted in the change:
http://lists.freebsd.org/pipermail/freebsd-performance/2004-January/000638.html

Jon